SF6 pressure detection device

Abstract

The utility model discloses an SF6 pressure detection device, belongs to the technical field of electrical equipment detection, is applied to an SF6 conveying pipe, and aims to solve the technical problem that in the prior art, SF6 pressure detection lacks an automatic low-pressure and high-pressure protection function. The SF6 pressure detection device comprises a pressure gauge installed on an SF6 conveying pipe. The pressure detection pipe is arranged on the SF6 conveying pipe and is communicated with the SF6 conveying pipe; the piston is arranged in the pressure detection tube, a spring is arranged between the piston and the top of the pressure detection tube, a pressure relief hole is formed in the middle of the piston, a plugging film is arranged in the pressure relief hole, a pricking needle capable of puncturing the plugging film is arranged at the top of the pressure detection tube, and a hollow plate is fixed at the bottom in the pressure detection tube. And a pressure sensor is mounted at the top of the hollow plate. The SF6 pressure detection device not only realizes the detection of SF6 pressure, but also has the functions of pressure relief protection and low-pressure sealing, and is beneficial to keeping the SF6 pressure stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical equipment detection, and specifically relates to a SF6 pressure detection device. Background Art

[0002] SF6, or sulfur hexafluoride, is an inorganic compound. At room temperature and pressure, it is a colorless, odorless, non-toxic, and non-flammable stable gas. It is widely used in many fields. In the power industry, it is widely used as an insulating medium and arc extinguisher in transmission and distribution systems. In the field of industrial manufacturing, SF6 gas also plays an important role in semiconductor production, casting and other production processes; in addition, in the mining and chemical industries, SF6 gas is used as a refrigerant and insulating medium.

[0003] In the application of SF6, pressure detection is an important link. The main purpose of pressure testing is to ensure that the test object can operate safely under normal working or stress environment, and to avoid equipment failure or safety accidents caused by abnormal pressure. However, in the current application of SF6, usually only a single pressure gauge is used to detect the SF6 pressure. Although it is simple and efficient, it lacks automatic low-pressure and high-pressure protection functions. When the SF6 pressure is too high or too low, it is easy to cause equipment failure or cause safety accidents due to processing delays. In view of this, the present application proposes an SF6 pressure detection device. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a SF6 pressure detection device, aiming to solve the technical problems that the SF6 pressure detection in the prior art lacks automatic low-pressure and high-pressure protection functions, and is prone to equipment failure or safety accidents due to delayed processing of excessively high or low pressure.

[0005] Technical Solution

[0006] In order to solve the above technical problems, the utility model provides an SF6 pressure detection device, which is applied to an SF6 delivery pipe. The SF6 pressure detection device includes a pressure gauge installed on the SF6 delivery pipe; a pressure detection tube installed on and connected to the SF6 delivery pipe; a piston arranged in the pressure detection tube, a spring is arranged between the piston and the top of the pressure detection tube, a pressure relief hole is opened in the middle of the piston, a sealing membrane is arranged in the pressure relief hole, and a puncture needle capable of piercing the sealing membrane is arranged on the top of the pressure detection tube.

[0007] Through the above-mentioned structural manner, the pressure gauge can be directly used to detect the SF6 pressure in the SF6 delivery pipe and transmit the signal, which is convenient for remote SF6 pressure detection; in addition, under the action of SF6 pressure, the piston will be pushed upward to compress the spring. When the SF6 pressure is too high, the piston is forced to move upward to compress the spring, and when the SF6 pressure exceeds the maximum threshold, along with the upward movement of the piston, the needle pierces the sealing film on the piston, and the pressure can be automatically relieved through the pressure relief hole on the piston, preventing the excessive SF6 pressure from affecting the normal operation of electrical equipment, and having a pressure relief protection function.

[0008] Preferably, a hollow plate is fixed at the bottom of the pressure detection tube, a pressure sensor is installed on the top of the hollow plate, and a sealing block capable of sealing the pressure relief hole is arranged on the top of the pressure sensor.

[0009] Preferably, the pressure detection tube is set to be transparent, and two scale lines are engraved on the side wall of the pressure detection tube, and the two scale lines are located in the middle of the pressure detection tube.

[0010] Through the above structure, when the SF6 pressure is normal, the piston is located between the two scale lines, which can intuitively judge whether the SF6 pressure in the SF6 delivery pipe is within the normal range. When the SF6 pressure is too low, the spring force pushes the piston downward, and when the SF6 pressure is about to fall below the minimum threshold, the sealing block blocks the pressure relief hole on the piston, which is conducive to maintaining the stability of the SF6 pressure.

[0011] Preferably, the SF6 delivery pipe is connected with a connecting valve, the connecting valve is provided with a pair of threaded seats, and the bottom ends of the pressure gauge and the pressure detection tube are provided with threaded connectors that are threadably matched with the threaded seats.

[0012] Preferably, an end cap is threadedly connected to the top end of the pressure detection tube, a through hole communicating with the pressure detection tube is formed on the end cap, and the spring is located between the piston and the bottom end of the end cap.

[0013] The above structural manner facilitates the assembly, disassembly and maintenance of the pressure gauge and the pressure detection tube, as well as the assembly and maintenance of the spring and the piston.

[0014] Preferably, a support rod is fixed at the top of the through hole, and the needle is fixed at the bottom of the support rod.

[0015] Preferably, a plurality of support rods are cross-arranged, and a partition net is arranged between the plurality of support rods and the inner wall of the through hole.

[0016] Through the above-mentioned structural manner, the isolation net can block and protect the through hole to prevent impurities such as mosquitoes from entering the pressure detection tube.

[0017] Beneficial Effects

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model, through the arrangement of a pressure detection tube, pushes the piston upward to compress the spring under the action of SF6 pressure. When the SF6 pressure is normal, the piston is located between two scale lines, and it can intuitively judge whether the SF6 pressure in the SF6 delivery pipe is within the normal range. When the SF6 pressure is too high, the piston is forced to move upward to compress the spring, and when the SF6 pressure exceeds the maximum threshold, along with the upward movement of the piston, the piercing needle pierces the sealing film on the piston, and the pressure can be automatically released through the pressure relief hole on the piston to prevent the excessive SF6 pressure from affecting the normal operation of the electrical equipment. When the SF6 pressure is too low, the spring elastic force pushes the piston downward, and when the SF6 pressure is about to fall below the minimum threshold, the sealing block seals the pressure relief hole on the piston, and no pressure is released at this time, which not only realizes the detection of the SF6 pressure, but also has the pressure relief protection and low-pressure sealing functions, which is conducive to maintaining the stability of the SF6 pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the pressure detection tube in the utility model;

[0023] Figure 3 It is a cross-sectional view of the pressure detection tube in the utility model;

[0024] Figure 4 It is a cross-sectional view of the piston in the utility model;

[0025] Figure 5 It is a structural schematic diagram of the end cap in the utility model.

[0026] The markings in the attached figure are: 1. SF6 delivery pipe; 2. connecting valve; 3. pressure gauge; 4. pressure detection tube; 5. threaded seat; 6. threaded connector; 7. scale line; 8. end cap; 9. piston; 10. spring; 11. needle; 12. pressure sensor; 13. sealing block; 14. hollow plate; 15. pressure relief hole; 16. sealing membrane; 17. through hole; 18. support rod; 19. partition net. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] This embodiment provides a SF6 pressure detection device, and its structural schematic diagram is as follows Figure 1-Figure 5 As shown, it is applied to the SF6 delivery pipe 1. The SF6 pressure detection device includes a pressure gauge 3 installed on the SF6 delivery pipe 1; a pressure detection pipe 4 installed on the SF6 delivery pipe 1 and connected to the SF6 delivery pipe 1; a piston 9 arranged in the pressure detection pipe 4, a spring 10 is arranged between the piston 9 and the top of the pressure detection pipe 4, a pressure relief hole 15 is opened in the middle of the piston 9, a sealing film 16 is arranged in the pressure relief hole 15, and a piercing needle 11 capable of piercing the sealing film 16 is arranged on the top of the pressure detection pipe 4. Through the above-mentioned structural method, the pressure gauge 3 can be directly used to detect The SF6 pressure in the SF6 delivery pipe 1 is measured and the signal is transmitted, which is convenient for remote SF6 pressure detection; in addition, under the action of SF6 pressure, the piston 9 is pushed upward to compress the spring 10. When the SF6 pressure is too high, the piston 9 is forced to move upward to compress the spring 10, and when the SF6 pressure exceeds the maximum threshold, along with the upward movement of the piston 9, the needle 11 pierces the sealing film 16 on the piston 9, and the pressure can be automatically relieved through the pressure relief hole 15 on the piston 9, preventing the excessive SF6 pressure from affecting the normal operation of the electrical equipment, and having a pressure relief protection function.

[0029] As a preferred technical solution in this embodiment, a hollow plate 14 is fixed at the bottom of the pressure detection tube 4, a pressure sensor 12 is installed on the top of the hollow plate 14, and a sealing block 13 capable of sealing the pressure relief hole 15 is arranged on the top of the pressure sensor 12. The pressure detection tube 4 is set to be transparent, and two scale lines 7 are engraved on the side wall of the pressure detection tube 4. The two scale lines 7 are located in the middle position of the pressure detection tube 4. When the SF6 pressure is normal, the piston 9 is located between the two scale lines 7, and it can be intuitively judged whether the SF6 pressure in the SF6 delivery pipe 1 is within the normal range. When the SF6 pressure is too small, the elastic force of the spring 10 pushes the piston 9 downward, and when the SF6 pressure is about to fall below the minimum threshold, the sealing block 13 seals the pressure relief hole 15 on the piston 9, which is conducive to maintaining the stability of the SF6 pressure.

[0030] As a preferred technical solution in this embodiment, a connecting valve 2 is connected to the SF6 delivery pipe 1, a pair of threaded seats 5 are arranged on the connecting valve 2, and threaded connectors 6 threadably matched with the threaded seats 5 are arranged at the bottom ends of the pressure gauge 3 and the pressure detection tube 4. The structure can facilitate the assembly, disassembly and maintenance of the pressure gauge 3 and the pressure detection tube 4.

[0031] Furthermore, in the present embodiment, an end cap 8 is threadedly connected to the top end of the pressure detecting tube 4, and a through hole 17 connected to the pressure detecting tube 4 is formed on the end cap 8. The spring 10 is located between the piston 9 and the bottom end of the end cap 8. After the end cap 8 is detached from the top end of the pressure detecting tube 4, the spring 10 and the piston 9 can be taken out, which facilitates the assembly of the piston 9 and the spring 10. A support rod 18 is fixed to the top of the through hole 17, and the puncture needle 11 is fixed to the bottom of the support rod 18, which facilitates the assembly of the puncture needle 11.

[0032] Furthermore, in this embodiment, a plurality of support rods 18 are crosswise arranged, and a partition net 19 is arranged between the plurality of support rods 18 and the inner wall of the through hole 17 . The partition net 19 can block and protect the through hole 17 to prevent mosquitoes and other impurities from entering the pressure detection tube 4 .

[0033] Working principle: When in use, the pressure gauge 3 can be used to directly detect the SF6 pressure in the SF6 delivery pipe 1 and transmit the signal. At the same time, under the action of the SF6 pressure, the piston 9 will be pushed upward to compress the spring 10. When the SF6 pressure is normal, the piston 9 is located between the two scale lines 7, and it can be intuitively judged whether the SF6 pressure in the SF6 delivery pipe 1 is within the normal range; when the SF6 pressure is too high, the piston 9 is forced to move upward to compress the spring 10, and when the SF6 pressure exceeds the maximum threshold, along with the upward movement of the piston 9, the needle 11 pierces the sealing film 16 on the piston 9, and the pressure can be automatically released through the pressure relief hole 15 on the piston 9 to prevent the excessive SF6 pressure from affecting the normal operation of the electrical equipment; when the SF6 pressure is too low, the spring 10 elastic force pushes the piston 9 downward, and when the SF6 pressure is about to fall below the minimum threshold, the sealing block 13 blocks the pressure relief hole 15 on the piston 9, and no pressure is released at this time, which not only realizes the detection of the SF6 pressure, but also has the pressure relief protection and low-pressure sealing functions, which is conducive to maintaining the stability of the SF6 pressure.

[0034] All technical features in this embodiment can be freely combined according to actual needs.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A SF6 pressure detection device, applied to a SF6 delivery pipe (1), characterized in that: The SF6 pressure detection device comprises: A pressure gauge (3) installed on the SF6 delivery pipe (1); A pressure detection tube (4) installed on the SF6 delivery pipe (1) and connected to the SF6 delivery pipe (1); A piston (9) is arranged in a pressure detection tube (4), a spring (10) is arranged between the piston (9) and the top of the pressure detection tube (4), a pressure relief hole (15) is opened in the middle of the piston (9), a sealing film (16) is arranged in the pressure relief hole (15), and a piercing needle (11) capable of piercing the sealing film (16) is arranged on the top of the pressure detection tube (4).

2. The SF6 pressure detection device according to claim 1, characterized in that: A hollow plate (14) is fixed to the bottom of the pressure detection tube (4), a pressure sensor (12) is installed on the top of the hollow plate (14), and a sealing block (13) capable of sealing the pressure relief hole (15) is arranged on the top of the pressure sensor (12).

3. The SF6 pressure detection device according to claim 1, characterized in that: The pressure detection tube (4) is configured to be transparent, and two scale lines (7) are engraved on the side wall of the pressure detection tube (4), and the two scale lines (7) are located in the middle of the pressure detection tube (4).

4. The SF6 pressure detection device according to claim 1, characterized in that: The SF6 delivery pipe (1) is connected to a connecting valve (2), and a pair of threaded seats (5) are provided on the connecting valve (2). The bottom ends of the pressure gauge (3) and the pressure detection tube (4) are provided with threaded connectors (6) that are threadably matched with the threaded seats (5).

5. The SF6 pressure detection device according to claim 1, characterized in that: The top end of the pressure detection tube (4) is threadedly connected to an end cap (8), and the end cap (8) is provided with a through hole (17) connected to the pressure detection tube (4). The spring (10) is located between the piston (9) and the bottom end of the end cap (8).

6. The SF6 pressure detection device according to claim 5, characterized in that: A support rod (18) is fixed at the top of the through hole (17), and the needle (11) is fixed at the bottom of the support rod (18).

7. The SF6 pressure detection device according to claim 6, characterized in that: A plurality of support rods (18) are cross-arranged, and a partition net (19) is arranged between the plurality of support rods (18) and the inner wall of the through hole (17).

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